Thermo-hygrometer measures humidity and temperature (displays in Fahrenheit or Celsius);Home Comfort Monitor with humidity level icon indicates air conditions -- DRY/COMFORT/WET;Digital thermometer hygrometer displays high and low temperature and humidity records;Totally wireless tabletop and magnet-mountable design; powered by one AAA battery included;Ensure proper indoor humidity control has important skin, allergen and other health benefits; 1 Year Warranty and ThermoPro US Based Customer Service (Phone & Email) 5 Days a Week